Benchmark: Set Prop Variable vs setAttribute

HTML Preparation code:

<style>
  .id {
    background-color: var(--myVar);
  }
</style>

<div id="test">Some content here</div>

Script Preparation code:

element = document.getElementById("test");

Tests:

style.setProperty
let i = 0; while (i < 10000) { element.style.setProperty("--myVar", "blue"); element.style.setProperty("--myVar", "red"); i++; }
style.setAttribute
let i = 0; while (i < 10000) { element.setAttribute("style", "--myVar: blue"); element.setAttribute("style", "--myVar: red"); i++; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
style.setProperty
style.setAttribute

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser/OS: Chrome 134 on Windows

View result in a separate tab

Test name	Executions per second
style.setProperty	121.7 Ops/sec
style.setAttribute	95.6 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark definition and test cases to help you understand what's being tested.

**Benchmark Definition:**
The benchmark definition represents a JavaScript microbenchmark that compares two approaches for setting a CSS property value on an HTML element:

1. `setProperty`: Using the `style.setProperty()` method.
2. `setAttribute`: Using the `element.setAttribute()` method with a string containing the CSS property-value pair.

**Options Compared:**

* `setProperty` vs `setAttribute`

The benchmark is testing which approach is faster and more efficient for setting a CSS property value on an HTML element, specifically when setting multiple values in a loop.

**Pros and Cons of Each Approach:**

1. `setProperty`:
	* Pros:
		+ More concise and readable syntax.
		+ Less chance of errors due to incorrect syntax or formatting.
		+ Better support for CSS variables (e.g., `var(--myVar)`).
	* Cons:
		+ May have performance overhead due to parsing and executing the string argument.
2. `setAttribute`:
	* Pros:
		+ Can be more efficient when setting multiple values, as it avoids string concatenation or formatting issues.
		+ Supports CSS variables (e.g., `var(--myVar)`).
	* Cons:
		+ More verbose syntax can lead to errors or mistakes.
		+ May have performance overhead due to parsing and executing the string argument.

**Library Usage:**
The benchmark uses no external libraries. It relies solely on built-in JavaScript methods (`style.setProperty()` and `element.setAttribute()`) and DOM elements.

**Special JS Features/Syntax:**
None mentioned in this specific benchmark definition. However, it's worth noting that some modern browsers (e.g., Chrome) support CSS variables (e.g., `var(--myVar)`), which might be relevant for other benchmarks or tests.

**Other Alternatives:**

* Other methods for setting CSS property values could include:
	+ Using a stylesheet or CSS rules (`element.style.cssText`).
	+ Using the `DOMTokenList` API (`element.style.setProperty()` with `tokenList` option).
	+ Using a third-party library or framework (e.g., React's `useStyle` hook).

Keep in mind that this benchmark is focused on comparing two specific approaches, and other alternatives might be relevant for different use cases or requirements.

Related benchmarks:

Set Prop Variable vs setAttribute (version: 0)

Comparing performance of: style.setProperty vs style.setAttribute

Created: 2 years ago by: Guest

Jump to the latest result

style.setProperty

style.setAttribute

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):